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Subject: RE: Again: Checking for non-existence of environment variable
Date: Tue, 24 Jan 2006 17:17:12 -0500
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Thread-Topic: Again: Checking for non-existence of environment variable
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From: "Burgess, Benjamin" <BBurgess@tiaa-cref.org>
To: "Ant Users List" <user@ant.apache.org>
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You keep adding the ${} when only the property name is required.

I assure you that all you need is this - just copy and paste it and
test:

<fail unless=3D"env.DAVINCI_EXT" message=3D"DAVINCI_EXT environment variable
has not been set!"/>

Ben

-----Original Message-----
From: Sergei Dubov [mailto:sdubov@gmail.com]=20
Sent: Tuesday, January 24, 2006 5:02 PM
To: Ant Users List
Subject: Again: Checking for non-existence of environment variable

I think this is finally what I've been struggling with. It doesn't seem=20
to work when the env variable actually exists. Here is my macro:

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D
<macrodef name=3D"check-for-ext">
         <sequential>
             <echo>${env.DAVINCI_EXT}</echo>
             <fail>
                 <condition>
                     <not>
                         <isset property=3D"${env.DAVINCI_EXT}"/>
                     </not>
                 </condition>
                 Cause:
                 DAVINCI_EXT environment variable has not been set!
             </fail>
         </sequential>
</macrodef>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D

And here is what I get trying to invoke it from basic task:

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D

serge@velocity ~/work/davinci-dev/davinci-master
$ echo $DAVINCI_EXT
serge

serge@velocity ~/work/davinci-dev/davinci-master
$ ant -f setup-user.xml setup-home
Buildfile: setup-user.xml

setup-home:
      [echo] serge

BUILD FAILED
C:\Documents and Settings\serge\My=20
Documents\work\davinci-dev\davinci-master\setup-user.xml:91: The=20
following error occurred while executing this line:
C:\Documents and Settings\serge\My=20
Documents\work\davinci-dev\davinci-master\setup-user.xml:201: Cause:
                 DAVINCI_EXT environment variable has not been set!

Total time: 0 seconds
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

I am using Cygwin on WinXP. Ant is 1.6.5.

Any ideas would be really appreciated.

Thanks again,

-Serge





Matt Benson wrote:
> uh... no.  Try it.  Then reread
> http://ant.apache.org/manual/CoreTasks/fail.html .
>=20
> -Matt
>=20
> --- Sergei Dubov <sdubov@gmail.com> wrote:
>=20
>=20
>>The whole point is that ${env.NO_VALUE} will return
>>${env.NO_VALUE} as=20
>>its value if it doesn't exist...
>>
>>-Serge.
>>
>>Burgess, Benjamin wrote:

>>
>>>Will <fail unless=3D"env.NO_VALUE"/> work for you?
>>>
>>>Ben
>>>
>>>-----Original Message-----
>>>From: Sergei Dubov [mailto:sdubov@gmail.com]=20
>>>Sent: Tuesday, January 24, 2006 3:48 PM
>>>To: user@ant.apache.org
>>>Subject: Checking for non-existence of environment
>>
>>variable
>>
>>>Hi guys,
>>>
>>>I am sure this question has been asked before. But
>>
>>I did my research and
>>
>>>found no answers whatsoever.
>>>
>>>Basically I am trying to check for existence of an
>>
>>environment variable.
>>
>>>And if it is not defined I want the script to
>>
>>fail.
>>
>>><project name=3D"base" basedir=3D"."
>>
>>default=3D"echo-env">
>>
>>>     <property environment=3D"env"/>
>>>
>>>     <target name=3D"echo-env">
>>>         <echo>${env.NO_VALUE}</echo>
>>>     </target>
>>></project>
>>>
>>>Basically this will return "${env.NO_VALUE}".
>>>
>>>And potential <available> check will think it
>>
>>actually HAS value. Is=20
>>
>>>there any way to make Ant recognize that
>>
>>System.getenv("NO_VALUE")=20
>>
>>>returns null?
>>>
>>>Thank you very much beforehand,
>>>
>>>Serge.
>>>
>>>
>>
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